Impermeable and non-hygroscopic material



UNITED STATES PATENT OFFICE.

MARIO AROSIO, OF MILAN, ITALY.

IMPERHEABLE AND, NON-HYGROSCOPIC MATERIAL No Drawing.

To all whom it may concern."

Be it known that I, MARIO Anosio, manufacturer, subject of the Kin of Italy, resident of Milan, 2 Via Carlo attaneo, in the Kingdomof Ital have invented new and useful Impermea 1e and Non-Hygroscopic Material, of which the following is a specification. I

As well known, vulcanized fiber 1s not completely impermeable or at least its sur-' face presents hygroscopic properties which in the long run 1mpa1r the mechanical strength and the insulating properties of the material.

The subject matter of the present inven-' tion is a novel insulating material which does not present the said inconveniences.

The novel material consistsin vulcanized fiber coated with a film of celluloid or acetylcellulose, care being taken. that the Specification of Letters Patent.

Patented 0a. 12, 1920.

Application filed June 23-, 1919. Serial No. 306,164.

coating substance be evenly distributed over the. surface and made to penetrate the surhow the same is to be carried out; what I claim as my invention 1s Impermeable non h groscopic material consisting of vulcanize fiber coated with a film of celluloid or acetylcellulose firmly adhering to the supportin surface.

In testimony whereof ,aflix mlyfii nature.

MARIO SIO. 

